Encuesta de Fecundidad Knowledge and use of contraceptions. Fem. between 15-49 Females between 15 and 49 years, non knowledge of contraceptions occupational history number of live births. Units: absolute figures Total None One Two Three Four Five and more Average Total 91,110 55,175 8,496 17,304 7,874 1,201 1,060 0.84 Previously worked sometime 56,218 30,977 5,197 14,320 4,664 .. 1,060 0.95 Have never worked 34,892 24,198 3,299 2,984 3,210 1,201 .. 0.68 Notes: Source: National Statistics Institute